In addition to costing millions to your business, malware can also take up a lot of your valuable time. Total Annualized Cyber Crime Cost for Attack Types in US$ millionsįrom the above figure, we find that malware is the costliest type of cyber-attacks for businesses today. The average amount that companies spent on malware and web-based attacks were $2.4 million and $2 million respectively. The study by Accenture also found that the costliest cyberattack types were malware and web-based attacks. The Key Findings of ‘The Cost of Cyber Crime’ Study by Accenture.